Add posts test

app/views/posts/_form.html.erb

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+<%= form_with(model: post) do |form| %>
+  <% if post.errors.any? %>
+    <div style="color: red">
+      <h2><%= pluralize(post.errors.count, "error") %> prohibited this post from being saved:</h2>
+
+      <ul>
+        <% post.errors.each do |error| %>
+          <li><%= error.full_message %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div>
+    <%= form.label :title, style: "display: block" %>
+    <%= form.text_field :title %>
+  </div>
+
+  <div>
+    <%= form.label :body, style: "display: block" %>
+    <%= form.textarea :body %>
+  </div>
+
+  <div>
+    <%= form.submit %>
+  </div>
+<% end %>

app/views/posts/_post.html.erb

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+<div id="<%= dom_id post %>">
+  <p>
+    <strong>Title:</strong>
+    <%= post.title %>
+  </p>
+
+  <p>
+    <strong>Body:</strong>
+    <%= post.body %>
+  </p>
+
+</div>

app/views/posts/_post.json.jbuilder

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+json.extract! post, :id, :title, :body, :created_at, :updated_at
+json.url post_url(post, format: :json)

app/views/posts/edit.html.erb

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+<% content_for :title, "Editing post" %>
+
+<h1>Editing post</h1>
+
+<%= render "form", post: @post %>
+
+<br>
+
+<div>
+  <%= link_to "Show this post", @post %> |
+  <%= link_to "Back to posts", posts_path %>
+</div>

app/views/posts/index.html.erb

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+<p style="color: green"><%= notice %></p>
+
+<% content_for :title, "Posts" %>
+
+<h1>Posts</h1>
+
+<div id="posts">
+  <% @posts.each do |post| %>
+    <%= render post %>
+    <p>
+      <%= link_to "Show this post", post %>
+    </p>
+  <% end %>
+</div>
+
+<%= link_to "New post", new_post_path %>

app/views/posts/index.json.jbuilder

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+json.array! @posts, partial: "posts/post", as: :post

app/views/posts/new.html.erb

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+<% content_for :title, "New post" %>
+
+<h1>New post</h1>
+
+<%= render "form", post: @post %>
+
+<br>
+
+<div>
+  <%= link_to "Back to posts", posts_path %>
+</div>

app/views/posts/show.html.erb

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+<p style="color: green"><%= notice %></p>
+
+<%= render @post %>
+
+<div>
+  <%= link_to "Edit this post", edit_post_path(@post) %> |
+  <%= link_to "Back to posts", posts_path %>
+
+  <%= button_to "Destroy this post", @post, method: :delete %>
+</div>

app/views/posts/show.json.jbuilder

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+json.partial! "posts/post", post: @post